Milk cooler



3 Sheets-Sheet l v Nm. SMQ 4 v U4 D J w. u* MN L. ROSENFELDY MILK COOLER Filed Sept. 22,` 1927 l Jan. l, 1929.

L. ROSEN FELD Jan. l, 1929.

MILK COOLER Filed sept. 22, i927 3 Sheets-Sheet 2 (ju/vento@ Jan. 1, 1929. I 1,697,696

L. ROSEN FELD MILK COOLERv Filed Sept. 22, 1927 3 Sheets-Sheet 5 Patented Jan. l, 1929.

FFICE.-

LOUIS ROSENFELD, OF BALTIMORE, MARYLAND, ASSIGN OR, :BY MESNE ASSIGNMENTS, TO CHERRY-BURRELL CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION 0F DELAWARE.

' MILK COOLER.

Application filed September 22, 1927. Serial No. 221,272.

This invention relates to heat-exchanging apparatus designed particularly for coollng milk, but suitable for cooling or liquid. a

In carrying out the invention, I prov1de opposed headers, each composed of a number of like sections arranged one above the other, and tubes connecting the sections of one header with the sections of the other, the tubes being connected in series by the headers. These tubes are adapted to convey the cooling liquid. Within the tubes just mentioned are other tubes for carrying the liquid to be cooled, and these latter tubes extend through the sections of the opposed headers, and couplings attached to the header sections connect the ends of the tubes to form a continuous conduit for the liquid. These couplings. are Carried by yokes which are hinged to the header sections so that the couplings may be swung out of line with the tubes to permit the latter to be cleaned or to be insertedor removed. Clamping screws extend through the yokes and directly support the couplings and means are provided for locking the yokes to the sections when the couplings are opposite the ends of the adjacent tubes. By turning the clamping screws the couplings may then be clamped over the ends of the tubes and against suitable packings. The ends ogf the inner tubes extend through. sleeves secured to the headers and provision is made for preventing leakage from the headers pastthe sleeves to the joints formed by the couplings. As it is very important that there shall be no intermingling of the liquids contained within the two sets of tubes, I provide means whereby any leakage from the headers flowing toward said joints will iiow to a point Where it will drop out and be detected.

The apparatus as a whole may be quickly assembled or taken apart or opened up for cleaning, and the capacity of the apparatus may be varied as desired, by varying the number of headers and tubes, or the number of sections in the headers.

In the accompanying drawing,

Fig. 1 is a top plan view of a milk cooler embodying my invention;

Fig. 2 is a side elevation of the same;

heating any' Fig. 3 is an end elevation of the upper part of the cooler;

Fig. 4 is a central vertical section through part of a header, adjacent tubes, the coupling Connecting the inner' tubes, and the yoke; and

Fig. 5-is a section on Athe line 5-5 of Fig. 4.

Referring to Figs. l to 3, inclusive, of the drawing, the cooler shown in the drawing is composed of three similar units, A, B, and C. The number-of units may be varied, to vary the capacity of the cooler. Each unit comprises opposed headers, as a-a, b-b, and C-c, these headers being mounted upon suitable supports d and connected together by tubes or pipes. The headers (1,12, and c are alike, each header, a s illustrated by the header c 1n Fig. 2, comprismg sections 1, 2, 3, 4, and v 5, bolted toget-her; and the headers a', b and c are alike, trated by the sections 6, 7,

eachGof these headers, as illusheader c in Fig. 2, comprising 8, and 9, which latter sections are duplicates in all respectsV of the sections 2, 3, and 4 of the header c.

elusive, extend between the set, these pipes being adapted to carry the cooling liquid. The section 1 has an opening to receive one end of the pipe 10, and the section 5 has an opening to receive one end of the pipe 17, and all ofthe other sections are provided with two openings to receive the ends of the pipes carrying the cooling liquid. Thus, the pipe 10 extends from section l of header c to section 6 of header c', and pipe 11 extends from the latter section to section 2 of header c; pipe 12 extends from the latter section to section 7 of header c', and the succeeding pipes are similarly connected in series by the headers. The sections of the header 0 are staggered with relation to the sections of the header c', and hence the succeeding pipes have a. slight downward inclination so that liquid entering the pipe y10 from the section 1 will ilow downwardly through the series of pipes and pass out through. the pipe 17. The cool- Pipes 10-17, in-

ing liquid enters vthe section 1 through a coni headers of each cooling liquid. Thus, as sho'wn in Fig. 2, pipes 20--27 extend through the pipes 10-17, respectively, and the ends of these pipes are coupled together, as hereinafter described, so that the fluid to be cooled may be forced in through the pipe 27 and will pass out through .the pipe 20, or it may be sent in the reverse direction. l

The connections between the pipes and the headers are illustrated in Fig. 4, wherein the lpipes 11 and 12 are threaded into one wall of the section 2, and the section forms a passageway connecting these pipes. The pipe 21 extends through the pipe 11 and through the section 2, and is supported by a sleeve 28, fitting closely around the pipe and having a part 28a, which is threaded into an opening 29 in the. outer wall 30 of the section. This sleeve has an annular shoulder 28", and a packing ring 31 is gripped tightly between the shoulder and the wall 30, to prevent leakage at the threaded joint 29. The sleeve 28 has a threaded part 28c at the opposite side of the shoulder from the threaded part 28a, and a ring 32 is threaded on to the part 28. This ring has a shoulder32a at its outer side, fitting closely against the outer surface of the tube 21, and a packing ring 33 is gripped between said shoulder and the part 28 of the sleeve. Perforations 34 extend radially through the shoulder portion of the ring and intersect an annular groove 35 at the inner periphery of the shoulder. The purpose of the groove 35 is to catch any liquid which may leak from the, interior of the section 2 between the tube 21 and the sleeve 28, and the purpose of the radial openings 34 is to permit this liquid to drain out from the groove so that the leakage can be seen and the leak thereby detected. The packing ring 33 prevents any leakage between said ring and the part 28c of the sleeve on which it is threaded. The pipe 21 projects beyond the outer face of the ring 32, and a U-shaped coupling 36 has one end fitting around the end of the pipe and the other end fitting around the end of the pipe 22. A packing ring 37 lits around the end of the pipe 21 and the coupling com: presses this ring against the ring 32 at the surface of the pipe so that liquid leaking from the interior of the section 2 past the sleeve 28 to the recess 35 cannot flow outwardly past the ring, but will be checked by the packing ring 37 and must flow into the annular recess 35, and thence through one or more of the perforations 34.

The coupling 36 is carried by a yoke 38 which is pivoted to the side of the section. As shown, parallel lugs 39 project from one side of the section, and parallel loops 40 project from the opposite side. The'yoke 38 has one of its arms 38a connected to the lugs 39 by a hinge pin 41, and the opposite arm 38b of the yoke has a hooked end 38C, which is adapted to slide between the loops 40. A

pin 42 extends through the loops and is adapted to be engaged by the hooked end of the yoke. The central part of the yoke has an internally threaded boss 38d, and a threaded clamping screw 43 extends through this boss and is provided on its outer end with a suitable hand wheel 44. The inner end of this adjusting screw has a hcad 43fwhich is held within a socket 46 in the central part of the coupling by a nut 45, threaded into the socket, the arrangement Abeing such that the screw has a swiveled connection with the coupling.

Vith the arrangement just described, when the yoke is in the position shown in Figs. 4 and 5, with the locking pin 42 engaged by the hook 38C, rotating the hand wheel 44 in one direction will force the coupling against the packing rings 37, surrounding thepipes 21 and 22, and thus make tight joints, and the liquid to be cooled may flow from one of these pipes through the coupling tothe other. At the same time, the cooling liquid may flow from the pipe 11 through the interior of the section 2- to the pipe 12. Vhen it is desired to remove the coupling for the purpose of cleaning the pipes, the hand wheel 44 may be turned in the proper direction to draw the coupling outwardly away from the ends of the pipes, and this will loosen the engagement of the hooked end of the yoke with the pin 42, and the latter may then be pushed into the position shown in dotted lines in Fig. 5, out of engagement with said hooked end. The yoke may then be swung about the pivot 41, carrying the coupling out of line with the pipes.

The liquids, of course, can be circulated in any desired direction through their respective pipe systems. In the drawing, the liquid to be cooled preferably enters through the pipe 27, at the bottom of the unit C and passes from the top pipe of said unit' through ay horizontal pipe 48 to the top pipe 20 of the unit B. After flowing downwardly through the pipes Vof this unit, it passes from the lowermost pipe thereof through a horizontal pipe 49 to the lowermost pipe of the unit A, thence upwardly to the pipes of the latter unit and outwardly through its uppermost pipe 20.

What I claim is:

1. The combination with opposed vcrtically arranged headers composed of sections,

yokes; each having one arm hinged to 5 a section and having la hook at the end of its other able i arm, locking pins on the sections movnto and out. of engagement with the hooks, clamping screws car-tied by the yokes, and couplings carried by said screws and adapted to cover the ends'of adjacent inner 10 A tubes.

In testimony whereof heieunto affix my signature.

LOUIS ROSENFELD. 

